Collimator

Terms and Definitions
The Collimator is an optical instrument consisting of a well corrected objective lens with an illuminated reticle at its focal plane. The emerging beam is parallel (collimated beam), so that the image of the reticle is projected at infinity. The collimator is usually set up in this way known as infinity adjustment (setting).

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Terms and Definitions

The Collimator is an optical instrument consisting of a well corrected objective lens with an illuminated reticle at its focal plane. The emerging beam is parallel (collimated beam), so that the image of the reticle is projected at infinity. The collimator is usually set up in this way known as infinity adjustment (setting).

 

 

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When moving the reticle out of the focal plane of the objective lens, the shape of the emerging beam will change:

• Moving the reticle away from objective lens will result in a convergent beam. The image of the reticle is real and projected at a finite distance.

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• Moving the reticle toward the objective lens will result in a divergent beam. If the beam diverges, a virtual image is produced at the apparent crossing point of the beam rays. This point is also located at a finite distance. 

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This adjustment of the collimator is known as finite distance setting.

 

CONSTRUCTION

The main components of a standard collimator (infinity setting) are:

• Tube mounted objective lens
• Reticle adapter
• Illumination device

A focusing collimator (finite distance setting) is similarly built. However, the reticle adapter is mounted on a draw out tube for focusing adjustment.

 

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Standard Collimators

Infinite setting

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Focusing Collimators
Finite setting
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Delivery Kit
The Collimators are delivered as complete ready-to-work instruments:
• Tube mounted objective lens
• Reticle adapter incl. reticle
• Illumination with green filter and 5W/6V bulb
The reticle adapters which might be included are:
image_8 Standard reticle adapter including one reticle at choice.
image_9 RC = Reticle changer with 4 positions. Four reticles at choice included.
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RC/FC =  Reticle changer with 4 positions. Four reticles at choice are included.

Filter changer with 4 positions. One green and one white diffuser are included. Further filters on request.